263847320407787 has 2 divisors, whose sum is σ = 263847320407788. Its totient is φ = 263847320407786.

The previous prime is 263847320407777. The next prime is 263847320407789. The reversal of 263847320407787 is 787704023748362.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-263847320407787 is a prime.

Together with 263847320407789, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (263847320407789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131923660203893 + 131923660203894.

It is an arithmetic number, because the mean of its divisors is an integer number (131923660203894).

Almost surely, 2^{263847320407787} is an apocalyptic number.

263847320407787 is a deficient number, since it is larger than the sum of its proper divisors (1).

263847320407787 is an equidigital number, since it uses as much as digits as its factorization.

263847320407787 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 531062784, while the sum is 68.

The spelling of 263847320407787 in words is "two hundred sixty-three trillion, eight hundred forty-seven billion, three hundred twenty million, four hundred seven thousand, seven hundred eighty-seven".